Scaffold



Dec. 26, 1939. KRUSE 2,184,457

SCAFFOLD Filed Jan. 5. 1939 2 Sheets-Sheet l 1227579 JZi zzse IN V EN TOR.

A TTORNEYS.

Dec. 26, 1939. H. J. KRUSE 2,134,457

SCAFFOLD Filed Jan. 5, 1939 2 Sheets-Sheet 2 fiery ellfwzzae I N VEN TOR.

A TTORNEYS.

Patented Dec. 26, 1939 UNITEo-isrATEs A ENT OFFiQE 1 Claim.

and particularly to scaffolds designed for use in washing or repairing windows.

An important object of the invention isto provide a scaffold of this character which may be folded into a small and compact article to facilitate the storing and shipping of the scaffold.

Another object of the invention is to provide a scafiold which will be exceptionally light in construction so that the scaffold may be easily han dled, due consideration being given to the strength and durability of the scaffold.

With the foregoing and other objects in view, which will appear asthe description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is an enlarged side elevational view of a scafiold constructed in accordance with the invention, as positioned adjacent to a window.

Figure 2 is a plan View thereof.

Figure 3 is a front elevational View of the scaifold.

Figure 4 is a View illustrating thescaffold in its folded position.

Referring to the the drawings in detail,

7 scaffold comprises spaced vertical bars 5 formed with offset portions at a point adjacent to the 0 upper ends thereof, the offset portions providing shoulders 6 adapted to fit over the window sill of a window. These bars 5 rise from. one end of the bars 1, on which the flooring 8 is secured, the connection between the bars 5 and'l, being made by means of the rod 9 that passes through openings formed in the bars 5 and I, the bars being secured against displacement,by means of the nuts [0. 7

At the opposite end of the bars 7, are, spaced vertical bars II which are secured to thejbars l at opposite sides of the scaifold, by means of the rod i2 which is shown as extending through registering openings in the bars I and H. Nuts 13 are secured at the ends of the rods l2, and secure the bars II, the nuts being positioned in such a way as to allow pivotal movement of the bars II with respect to the bars I. The upper ends of the bars! 5 and H at one side of the scafiold, are connected by means of the bar M, which has pivotal connection with the bars ll so that piv- This invention relates to scaffold construction.

otal movement of the scafiold frame will be permitted. The bars 5 and ll at the opposite side of the scaffold frame are pivotally connected with the bar 15. Pivotally connected with the bars 1 at opposite sides of the frame, are bars l5, which are slightly curved, as clearly shown by Figure l of the drawings. The connection between the bars I5 and bars 1, is made through the bolts Hi. These bars. l5 are provided with elongated openings I! that accommodate the ends of the rod l8 that extends through the bars 5,,the rod l8 being held in position by means of nuts 19. Thus it will be seen that when these nuts l9 are tightened, the bars l5 will be securely held against the bars 5, and against movement with respect to the bars 5. The upper supporting bars of the scaffold are arranged at opposite sides thereof, each bar including slidably connected sections 20 and 2!, the section 20 having extensions 22 that are bent over the section 2|, while the section 2! is formed with extensions that are bent over the section 20, providing this slidable connection. The bars 29 and 2| are provided with openings in which the bolts 23 are positioned, the bolts being provided with winged nuts 24, whereby the sections 20 and 2| may be drawn into close engagement with each other after the proper adjustment has been made. The bars l5 have pivotal connection with the bars 2i, through the bolts 25. These supporting arms have pivotal connection with the diagonally disposed brace bars 26, at 21, the opposite ends of the bars 25 being connected to the bars 5 near the lower ends thereof, as at 28.

As shown, the outer ends of the sections 2|], extend downwardly, where they are supplied with elastic cushioning members 29, which are designed to hook over the window sill, and cooperate with the shoulders 6 in gripping the window sill.

In order that the scaifold may provide a guard against a person leaning rearwardly, falling from,

the scaffold, the upper ends of the bars H, extend appreciable distances above the bars M, where they are connected by means of the rod 30. This rod 36 also provides a handle whereby the person using the scaffold may steady him- 7 self, while at work.

A rod 3| connects the bars ll near the lower end thereof, and acts to hold the bars H in predetermined spaced relation with respect to each other at all times.

Thus it will be seen that due to the construction shown and described, I have provided a scaffold which may be readily and easily unfolded or extended to a position as shown by Figure 1 of the drawings, whereupon the scafiold may be positioned over a window sill as shown, thereby providing a scafiold which may be used by a window Washer or person repairing the window, to the end that the work may be accomplished with facility,

What is claimed is:

A scaffold comprising a rectangular frame embodying parallel upper and lower side bars and vertical front and rear bars, the inner ends of the upper side bars extending downwardly and adapted to hook over a window sill, diagonally disposed adjustable bars pivotally connected to the upper and lower side bars and having elongated openings formed therein, bolts extending from the vertical front bars and operating in the elongated openings, nuts on the bolts for securing the diagonally disposed bars in various positions of adjustment, the lower ends of the diagonally disposed bars being curved outwardly, diagonally disposed bars pivotally connected with the vertical front bars and upper side bars, the latter diagonally disposed bars crossing the first mentioned diagonally disposed bars, and a flooring on the scaffold.

HENRY J. KRUSE. 

